Sun Microsystems 440 manual Externally Initiated Reset XIR, Manual System Reset

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Externally Initiated Reset (XIR)

Use the ALOM system controller reset -xcommand to execute an externally initiated reset (XIR). Forcing an XIR might be effective in breaking the deadlock that is hanging up the system. However, an XIR also precludes the orderly shutdown of applications, and so it is not the preferred method of reaching the ok prompt, unless you are troubleshooting these types of system hangs. Generating an XIR has the advantage of allowing you to issue the sync command to produce a dump file of the current system state for diagnostic purposes.

For more information, refer to:

■Netra 440 Server Diagnostics and Troubleshooting Guide (817-3886-xx)

■Advanced Lights Out Manager User’s Guide (817-5481-xx)

Caution – Because an XIR precludes an orderly shutdown of applications, it should only be attempted if previously described methods do not work.

Manual System Reset

Use the ALOM system controller reset command, or poweron and poweroff commands, to reset the server. Reaching the ok prompt by performing a manual system reset or by power-cycling the system should be the method of last resort. Doing this results in the loss of all system coherence and state information. A manual system reset could corrupt the server’s file systems, although the fsck command usually restores them. Use this method only when nothing else works.

Caution – Forcing a manual system reset results in loss of system state data, and should be attempted only as a last resort. After a manual system reset, all state information is lost, which inhibits troubleshooting the cause of the problem until the problem reoccurs.

Caution – Accessing the ok prompt suspends the Solaris OS.

When you access the ok prompt from a functioning Netra 440 server, you are suspending the Solaris OS and placing the system under firmware control. Any processes that were running under the operating system are also suspended, and the state of such processes might not be recoverable.

The diagnostic tests and commands you run from the ok prompt have the potential to affect the state of the system. This means that it is not always possible to resume execution of the operating system from the point at which it was suspended.

12 Netra 440 Server System Administration Guide • August 2004

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Contents Netra 440 Server System Administration Guide Page Contents Managing RAS Features and System Firmware Managing Disk Volumes Iv Netra 440 Server System Administration Guide August Figures Vi Netra 440 Server System Administration Guide August Tables Viii Netra 440 Server System Administration Guide August Preface How This Book Is OrganizedUsing Unix Commands Shell PromptsTypographic Conventions Related DocumentationContacting Sun Technical Support Accessing Sun DocumentationThird-Party Web Sites Sun Welcomes Your CommentsConfiguring the System Console Communicating With the System1Ways of Communicating With the System Using the System Console What the System Console DoesSerial MGT NET MGT Alom serial management port Alom network management port Alternative System Console Configuration 3Alternative Console Ports Require Additional ConfigurationAccessing the System Console Through a Graphics Monitor About the sc Prompt Reaching the sc Prompt OpenBoot ok PromptAccess Through Multiple Controller Sessions Reaching the ok Prompt L1-A Stop-A Keys or Break Key Alom System Controller break or console CommandGraceful Shutdown Externally Initiated Reset XIR Manual System ResetFor More Information Getting to the ok Prompt2Ways of Accessing the ok Prompt To Get to the ok PromptConsole # Accessing the System Controller Using the Serial Management PortEstablish an Alom system controller session Activating the Network Management PortTo Use the Serial Management Port Log out of the Alom system controller session To verify the network settings, typeTo Activate the Network Management Port Accessing the System Console Through a Terminal Server To Access The System Console Through a Terminal Server3Pin Crossovers for Connecting to a Typical Terminal Server Open a terminal session on the connecting device, and type Accessing the System Console Through a TIP Connection Power on the systemTo Access the System Console Through the TIP Connection A shell tool window on the Sun system, typeOk power-off To Modify the /etc/remote File If the number displayed by the uname -rcommand is less thanModifying the /etc/remote File Netra 440 Server System Administration Guide August Ok setenv input-device ttyb ok setenv output-device ttyb Open a shell tool window Type Verifying Serial Port Settings on TtybTo Verify the Serial Port Settings on Ttyb Look for the following outputFor more information, see Getting to the ok Prompt on To cause the changes to take effect, type System Console OpenBoot Configuration Variable Settings Output-device Ttya Ttyb Screen Input-device KeyboardNetra 440 Server System Administration Guide August Managing RAS Features and System Firmware Alom System Controller Logging In To the Alom System ControllerAbout the scadm Utility To Log In To the Alom System ControllerTo View Environmental Information Sc showenvironmentControlling the Locator LED To turn on the Locator LED, do one of the followingTo turn off the Locator LED, do one of the following OpenBoot Emergency Procedures Stop-N Functionality To Restore OpenBoot Configuration DefaultsStop-A Functionality Stop-F Functionality Automatic System RecoveryTo reset the system, type the following command Stop-D FunctionalityAuto-Boot Options Error Handling Summary Enabling and Disabling Automatic System Recovery Reset ScenariosAutomatic System Recovery User Commands To Enable Automatic System RecoveryTo cause the parameter change to take effect, type To Disable Automatic System RecoveryTo cause the parameter changes to take effect, type To Unconfigure a Device Manually Unconfiguring and Reconfiguring DevicesObtaining Automatic System Recovery Information To determine full physical device paths, type To Reconfigure a Device Manually To Enable the Hardware Watchdog Mechanism Enabling the Hardware Watchdog Mechanism and Its OptionsMultipathing Software Managing Disk Volumes Disk VolumesSun StorEdge Traffic Manager Volume Management SoftwareVeritas Dynamic Multipathing Managing Disk Volumes RAID Technology Disk ConcatenationRAID 0 Disk Striping RAID 1 Disk MirroringHot-Spares Hardware Disk MirroringRAID 5 Disk Striping With Parity To Create a Hardware Disk Mirror C1t3d0 Devices/pci@1f,700000/scsi@2/sd@3,0For example To Delete a Hardware Disk Mirror To delete the volume, type the following command To confirm a failed disk, type the following command To Perform a Mirrored Disk Hot-Plug OperationTo Perform a Non-Mirrored Disk Hot-SwapOperation View the status of the Scsi devices CD-ROMRemove the hard drive from the device tree # cfgadm -x removedevice c0dsk/c1t1d0Configure the new hard drive Verify that the device has been removed from the device treeVerify that the new hard drive is in the device tree OpenBoot Configuration Variables Baudrate, bits Appendix a OpenBoot Configuration Variables Netra 440 Server System Administration Guide August Alarm Relay Output Application Programming Interface Netra 440 Server System Administration Guide August Page Netra 440 Server System Administration Guide August Page Netra 440 Server System Administration Guide August Symbols IndexNetra 440 Server System Administration Guide August Asr-disable, 46 go Console, 11, 41 console -f, 9 poweroff, 12 poweron Uadmin 11 uname, 25 uname -r Netra 440 Server System Administration Guide August